CN201173802Y - Dry-type cassette mechanism with two end positioning needle point - Google Patents

Abstract

The utility model discloses a dry machine core positioned by two ends of a needle point, the rotating shaft of the impeller (8) is made into a needle (9) with two pointed ends by a wearable material such as a hard alloy and embedded in the impeller (8); the bottom of the impeller box (7) is embedded into one or a plurality of concave columns (10) made of a wearable material such as a hard alloy; a metal insert (6) with internal thread is embedded in the center of the impeller box cover (1), two metal bars (2) are embedded at the peripheral equal circles of the metal insert (6), the ends of the metal insert (6) and the metal bars (2) close to the impeller box cover (7) expose a part of the impeller box cover (7), and the top ends of the metal insert (6) and the two metal bars (2) are respectively led out a signal conducting wire (4); a regulating screw (5) is firstly screwed into the metal insert (6), and one or a plurality of concave columns (10) are embedded in the regulating screw (5); a sealing screw (3) is screwed into the metal insert (6) at the upper part of the regulating screw (5).

Description

Location, needle point two ends dry type movement

Technical field:

The utility model belongs to fluid metering instrument accessory, relates in particular to a kind of location, needle point two ends dry type movement that can improve fluid metering sensitivity.

Background technology:

At present, be used for the velocity type water meter in family and other place and be the heat energy table of base table with the velometer, its rotary blade adopts single-ended nylon mostly and stainless steel is top shores.These are top owing to be the unidirectional impeller of shoring, so under the promotion of fluid the impeller swing can take place, will make the impeller instability, thereby cause water meter or heat energy table metering performance inaccurate; On the other hand, because these top tips are thicker, make the friction force of itself and impeller contact position bigger, thereby impeller impeller when flowing through than the fluid of low discharge is not easy to be rotated, the initiating flow that is embodied in water meter or heat energy table at last is higher.

The purpose of this utility model is exactly in order to address the above problem, location, a kind of needle point two ends dry type movement is provided, it not only makes impeller have the fluid Shi Buhui that flows through swing to take place and make its flow metering accurately and stable, and impeller is easy to rotate and the initiating flow of flowmeter is reduced greatly when flowing through than the fluid of low discharge.

Summary of the invention:

The utility model is achieved in that it is that the two ends that the rotating shaft of impeller is made with high-abrasive materials such as wimet are point-shaped needle and are embedded in the impeller; Bottom at impeller box embeds a recessed cylinder made from high-abrasive materials such as wimet; Center at the impeller lid embeds a female metal insert, circle places such as periphery at this metal insert embed two metal bars, metal insert and metal bar all expose an impeller lid part by impeller lid end, respectively draw a signal conductor on the top of metal insert and two metal bars and go out; Screw in a set screw in metal insert earlier, set screw is embedded with one or more recessed cylinders made from high-abrasive materials such as wimet; In the metal insert on set screw top, screw in a sealing screw.The utility model can also be realized like this: will with high-abrasive materials such as wimet make recessed cylinder embed in the impeller shaft, bottom at impeller box embeds a point-shaped needle made from high-abrasive materials such as wimet, also embeds a point-shaped needle in the set screw that screws in metal insert.During assembling, earlier impeller is put into impeller box, load onto the impeller lid on the top of impeller box then, in metal insert, screw in set screw again, so that impeller can rotate reposefully.Owing to done nonmetal catch on the impeller, it can periodically stop metal insert and metal bar along with the rotation of impeller, thereby make the variation of the impedance generating period between metal insert and the metal bar, we just can realize the Measuring and testing of convection cell by the impedance variation between measurement metal insert and the metal bar.

The benefit of doing like this is exactly: because impeller is located by two ends, so impeller speed ratio when fluid flows is more steady, thereby measure more stable; In addition, because impeller is by the two ends of needle point location, friction force is lower when rotated, so as long as there is very little fluid flow to flow through, impeller will rotate and realize metering.

Description of drawings:

Fig. 1 is a cut-open view of the present utility model.

Fig. 2 is the cut-open view of another kind of form of the present utility model.

Among the figure: 1, impeller lid; 2, metal bar; 3, sealing screw; 4, signal conductor; 5, set screw; 6, metal insert; 7, impeller box; 8, impeller; 9, point-shaped needle; 10, recessed cylinder; 11, screen pack.

Embodiment:

The utility model is achieved in that it is to be point-shaped needle (9) with the two ends that the rotating shaft of impeller (8) is made with high-abrasive materials such as wimet and to be embedded in the impeller (8); Bottom at impeller box (7) embeds one or more recessed cylinders made from high-abrasive materials such as wimet (10); Center at impeller lid (1) embeds a female metal insert (6), circle places such as periphery at this metal insert (6) embed two metal bars (2), metal insert (6) and metal bar (2) all expose impeller lid (a 7) part by impeller lid (7) end, respectively draw a signal conductor (4) on the top of metal insert (6) and two metal bars (2) and go out; Screw in a set screw (5) in metal insert (6) earlier, set screw (5) is embedded with one or more recessed cylinders made from high-abrasive materials such as wimet (10); In the metal insert (6) on set screw (5) top, screw in a sealing screw (3).The utility model can also be realized like this: will with high-abrasive materials such as wimet make recessed cylinder (10) embed in impeller (8) rotating shaft, bottom at impeller box (7) embeds a point-shaped needle (9) made from high-abrasive materials such as wimet, also embeds a point-shaped needle (9) in the set screw (5) that screws in metal insert (6).During assembling, earlier impeller (8) is put into impeller box (7), load onto impeller lid (1) on the top of impeller box (7) then, in metal insert (6), screw in set screw (5) again, so that impeller (8) can rotate reposefully.Owing to done nonmetal catch on the impeller (8), it can periodically stop metal insert (6) and metal bar (2) along with the rotation of impeller (8), thereby make the variation of the impedance generating period between metal insert (6) and the metal bar (2), we just can realize the Measuring and testing of convection cell by the impedance variation between measurement metal insert (6) and the metal bar (2).

Claims (2)

1. needle point two ends location dry type movement is characterized in that: with the rotating shaft of impeller (8) with point-shaped needle (9) and be embedded in the impeller (8); Embed one or more recessed cylinders (10) in the bottom of impeller box (7); Center at impeller lid (1) embeds a female metal insert (6), screws in a set screw (5) in metal insert (6), and set screw (5) is embedded with one or more recessed cylinders made from high-abrasive materials such as wimet (10); In the metal insert (6) on set screw (5) top, screw in a sealing screw (3).

2. according to location, the described needle point of claim 1 two ends dry type movement, it is characterized in that: recessed cylinder (10) is embedded in impeller (8) rotating shaft, bottom at impeller box (7) embeds a point-shaped needle (9), also embeds a point-shaped needle (9) in the set screw (5) that screws in metal insert (6).

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